LibURL: Implement Site concept

Author: https://github.com/AtkinsSJ
Commit: b83f015c70
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2610
Reviewed-by: https://github.com/shannonbooth ✅

Libraries/LibURL/CMakeLists.txt

@@ -4,6 +4,7 @@ set(SOURCES
     Host.cpp
     Origin.cpp
     Parser.cpp
+    Site.cpp
     URL.cpp
     ${PUBLIC_SUFFIX_SOURCES}
 )